Antenna device and communications apparatus comprising same
An antenna device comprising (a) a mounting substrate having a ground
portion and a non-ground portion, (b) a chip antenna mounted onto said
non-ground portion, which comprises a substrate, a first radiation
electrode formed on said substrate, a power-supplying electrode connected
or not connected to the other end of said first radiation electrode, and
a terminal electrode connected or not connected to one end of said first
radiation electrode, and (c) at least one second radiation electrode
formed in a conductor pattern on said non-ground portion, said second
radiation electrode having one end connected or not connected to said
terminal electrode and the other end which is an open end, and a cavity
existing between said chip antenna and/or said second radiation electrode
and said ground portion.
Takaki; Yasunori (Kumagaya, JP), Aoyama; Hiroyuki (Kumagaya, JP) |
Hitachi Metals, Ltd.
August 6, 2004|